CN1713775A - Wireless communication system and device - Google Patents
Wireless communication system and device Download PDFInfo
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- CN1713775A CN1713775A CNA2005100809337A CN200510080933A CN1713775A CN 1713775 A CN1713775 A CN 1713775A CN A2005100809337 A CNA2005100809337 A CN A2005100809337A CN 200510080933 A CN200510080933 A CN 200510080933A CN 1713775 A CN1713775 A CN 1713775A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/23—Manipulation of direct-mode connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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Abstract
A wireless communication system having wireless terminal stations to perform direct communication without passing through a wireless base station. This system includes a wireless communication device which performs either a first wireless communication using a first channel having a first frequency band or the second wireless communication using a second channel having a second frequency band with a bandwidth greater than that of the first frequency band. This system also includes a generation device which generates a switching control frame to control switching between a communication period by the first wireless communication and a communication period by the second wireless communication, and a communication control device which controls the wireless communication device so as to transmit the switching control frame. A wireless terminal station is selected as a temporal central control station having a switching control right to control switching between the first and second wireless communications.
Description
Technical field
The present invention relates to a kind of wireless communication system and a kind of radio communication device, a plurality of radio communication devices carry out radio communication mutually by sharing a plurality of different frequency channels.
Background technology
Media interviews controls (MAC) are a kind of like this control, and it determines should how to utilize described medium and send communication data by a plurality of communicators that shared identical media communicates.As the result who carries out MAC,, also can reduce the incidence of the incident (so-called collision) that makes the communicator that receives a side can not make the communication data separation even two or more communicator sends communication data simultaneously by utilizing identical media.As the result who carries out MAC, also can reduce no matter whether have the communicator of the request of transmission exists, and the incident that described medium are not used by any communicator.
In radio communication, because communicator is difficult to monitoring transmission data when sending data, so need a kind of MAC that does not take collision detection.IEEE 802.11 as the representative art standard that is used for WLAN (wireless local area network) (LAN) adopts the carrier sense multiple access (CSMA/CA) with collision elimination.
In IEEE 802.11, CSMA/CA is arranged on mac frame exchanges the sequence of forming 1 afterwards until one or more frames to the header of mac frame one-period (being called as the duration).At this section in the duration, do not have big relation with described sequence and do not have the communicator of transmission route to be in and be ready for sending by the virtual seizure condition of determining medium.Thus, collision is avoided.In contrast, the communicator that has transmission route in described sequence can know, except medium by the cycle actual the taking, described medium are not used.
IEEE 802.11 regulation, the state of medium is determined in the combination of intercepting (such as the latter) by the physical carrier in virtual carrier sensing in wireless network communication in the MAC layer (such as the former) and physics (PHY) layer, and determines that based on this result carries out MAC.
The Japanese patent application communique discloses a kind of method 2003-87856 number, is used for realizing the wireless base station that can be shared by a plurality of Wireless LAN systems of system, in said system, and the wireless local area network (WLAN) system coexistence that a plurality of physical layers have nothing in common with each other.Specifically, the wireless base station alternately is created in first notification signal in first physical layer, and second notification signal in second physical layer, so that they are sent to a wireless terminal, and switch synchronously first and second physical layers with first and second notification signals.The base station makes corresponding to the wireless terminal of first physical layer and is only conducting interviews in the fixed time of the transmitting time of first notification signal, and makes corresponding to the wireless terminal of second physical layer and only conducting interviews in the fixed time of the transmitting time of second notification signal.
Up to now, adopt the IEEE 802.11 of CSMA/CA to accelerate communication speed by mainly changing physical layer protocol.For the 2.4-GHz frequency band, IEEE 802.11 (build on 1997, changed into IEEE 802.11b and (built on 1999, communication speed=11Mbps) by communication speed=2Mbps), and change into IEEE 802.11g further and (build on 2003, communication speed=54Mbps).For the 5-GHz frequency band, the current IEEE 802.11a that has only that exists as standard criterion (builds on 1999, communication speed=54Mbps).
As a kind of scheme of accelerating communication speed, can use the method that increases channel width.In a kind of method of spread channel bandwidth, has the channel of certain bandwidth and the one other channel that has greater than the bandwidth of the bandwidth of certain channel coexists as in certain frequency band.Yet traditional CSMA/CA is designed to carry out the access control for individual channel, and therefore, it can not carry out the MAC for a plurality of channels with different bandwidth.
For a plurality of channels with different bandwidth that coexist as in the same frequency band, the easiest MAC system comprises such system, and therein, a console for centralized control manages each MAC.For example, in IEEE 802 wireless local area network (WLAN) system, an access point (AP) can be managed each MAC.In recent years, a kind of be used for directly sending from a mobile radio station to another mobile radio station and receive data waiting for transmission and not ad hoc (ad hoc) network by console for centralized control be subjected to people's attention, its advantage is to prevent that factor is according to make the efficiency of transmission reduction by console for centralized control.
Yet such one does not exist the wireless communication system of console for centralized control can not use above-mentioned solution therein.
Summary of the invention
Be conceived to the problems referred to above, one object of the present invention just provides a kind of wireless communication system, a kind of wireless communications method and a kind of radio communication device, can carry out MAC to a plurality of channels in the same frequency band that coexists as wireless communication system with different bandwidth, so that between each radio terminal station, carry out direct communication, and do not pass through console for centralized control.
According to an aspect of the present invention, provide a kind of wireless communication system, do not passed through console for centralized control so that carry out direct communication with a plurality of radio terminal stations.This system comprises Wireless Telecom Equipment, and it is configured to use first channel with first frequency band to carry out first radio communication, perhaps uses to have bandwidth and carry out second radio communication greater than the second channel of second frequency band of the bandwidth of first frequency band.This system also comprises a generation equipment, it is configured to generate a switching controls frame, so that control the switching between the communication cycle of the communication cycle of first radio communication and second radio communication, and communication control unit, it is configured to control described Wireless Telecom Equipment, so that send the switching controls frame that is generated by generation equipment.A radio terminal station is chosen to be the Provisional Center control station with switching controls power, is used to control the switching between first radio communication and second radio communication.
Wireless communication system according to various embodiments of the present invention comprises a plurality of radio terminal stations, be used to carry out direct communication and do not pass through the wireless base station, first channel that each use in a plurality of radio terminal stations has first frequency band carries out first radio communication, perhaps use and have bandwidth and carry out second radio communication greater than the second channel of second frequency band of the bandwidth of first frequency band, wherein, from a plurality of radio terminal stations, select a switching controls power owner, be used to control the switching between the communication cycle of the communication cycle of first radio communication and second radio communication with switching controls power.
Description of drawings
Fig. 1 is the view that the configuration of the terminal that relates to the first embodiment of the present invention is shown;
Fig. 2 is the view of configuration that another terminal of first embodiment is shown;
Fig. 3 is the view that explanation relates to the network configuration of first embodiment;
Fig. 4 relates to the schematic diagram of an example of the network configuration of first embodiment;
Fig. 5 is the view that explanation relates to the another kind of network configuration of first embodiment;
Fig. 6 is the view that explanation relates to the media interviews system of first embodiment;
Fig. 7 is the view that the terminal configuration that relates to first embodiment is shown;
Fig. 8 is the view that the another kind of terminal configuration that relates to first embodiment is shown;
Fig. 9 is the view of an example that the use of the frequency channels that relates to first embodiment is shown;
Figure 10 is that the view of owner's selection step is weighed in 20-/40-MHz switching that explanation relates to first embodiment;
Figure 11 is the view that the configuration of the beacon frame that relates to first embodiment is shown;
Figure 12 is the view that the configuration of other terminal that relates to first embodiment is shown;
Figure 13 illustrates the view that the 20-/40-MHz that relates to second embodiment switches power owner's selection step.
Embodiment
Now with reference to accompanying drawing, various embodiments of the present invention are described.
The wireless communication system that was used for the search rate channel before communicating comprises that (revised edition 2003 comprises ISO/IEC 8802-11:1999 (E) ANSI/IEEE standard 802.11 based on ieee standard 802.11-1999,1999 versions, ieee standard 802.11a-1999, ieee standard 802.11b-1999, ieee standard 802.11b-1999/Cor 1-2001 and ieee standard 802.11d-2001) wireless local area network (WLAN) system.Below, will a kind of basic system configuration be described according to IEEE 802.11 wireless local area network (WLAN) system.IEEE 802.11 standards are the standard criterions at PHY layer and MAC layer.The processing procedure that mainly focuses in the MAC layer is illustrated following processing procedure.IEEE 802.11 standard criterions also comprise the standard criterion that is positioned as its modification or recommends practice.
(first embodiment)
As shown in Figure 1, according to broad classification, comprise PHY layer 10, MAC layer 20 and link layer 30 according to the radio communication device of the first embodiment of the present invention.In Fig. 1, PHY layer 10 is corresponding to the two class PHY layer protocols that use different bandwidth.Promptly, PHY layer 10 has first channel that has first communication bandwidth by use and carries out the PHY layer protocol processing unit 11 that the PHY layer protocol communicates, and has wideer and carry out the 2nd PHY layer protocol processing unit 12 that the PHY layer protocol communicates with the second channel of the overlapping second communication bandwidth of first communication bandwidth than first communication bandwidth by use.First processing unit 11 and second processing unit 12 are shared a circuit continually mutually aspect actual installation, and they are also not exclusively separate.
Handled agreement comprises at least in first processing unit 11, for example, and by the PHY agreement of IEEE802.11a regulation.First bandwidth of being used by first processing unit 11 is set to, for example, and 20MHz.First processing unit 11 can use a kind of so-called multiple-input and multiple-output (MIMO) technology, and by this technology, each among a plurality of antenna 13A-13C is respectively applied for transmit leg and recipient.The MIMO technology is the technology of the height possibility of a kind of IEEE 802.11 task groups n (TGn) with the more high-throughput that is applied to being intended to obtaining IEEE 802.11.
Decode by a PHY layer protocol processing unit 11 or 12 pairs of data that receive by antenna 13A-13C of the 2nd PHY layer protocol processing unit conversely speaking,, and decoded data are sent to MAC layer 20 from PHY layer 10.Here it should be noted that the data of being not only that between PHY layer 10 and MAC layer 20, exchange once more, and also have control signal.For example, provide a control signal to PHY layer 10, be used to instruct PHY layer 10 between a PHY layer protocol processing unit 11 and the 2nd PHY layer protocol processing unit 12, to switch (with respect to pending data-signal) from MAC layer 20.
The carrier sense state is managed by the combination of the virtual carrier sensing in wireless network communication information using the actual carrier interception information that obtains from PHY layer 10 and obtained by the agreement of MAC layer 20 in carrier sense unit 22, come management channel the free time/take (not busy/busy) state.In other words, single spare time/busy condition is not managed in carrier sense unit 22, but manages the spare time/busy condition more than a second channel more than one first channel and second bandwidth of first bandwidth.
Channel occupancy/opening control unit 24 produces the frame of the virtual carrier sensing in wireless network communication state that is used to control MAC layer 20, need take the channel of designated period or open occupied channel.The frame that is produced by control unit 24 is sent to PHY layer 10, and is sent by first processing unit 11 and second unit 12.
Channel status administrative unit 23 makes first and second protocol processing unit 10,12 of carrier sense unit 22, and control unit 24 and 10 collaborative work of PHY layer are so that the channel access of expecting control.
As a special case of radio communication device shown in Figure 1, for example, a 40-/20-MHz MIMO STA (AP) and a 40-/20-MHz STA (AP) are provided.40-/20-MHz MIMO STA (AP) is one and can sends and receive SISO, send and receive MIMO, send and receive SISO and send and receive the terminal (or AP) of MIMO by 40-MHz by 40-MHz by 20-MHz by the 20-MHz channel.40-/20-MHz STA (AP) is one can pass through the terminal (or AP) that the 20-MHz channel sends and receives SISO and send and receive MIMO by 40-MHz.As for link layer 30, suppose that it has the function of the common link layer of regulation in IEEE 802.
Another radio communication device shown in Figure 2 is different from radio communication device part shown in Figure 1 and is, PHY layer 10 does not comprise the 2nd PHY protocol processing unit 12 shown in Figure 1.Another radio communication device shown in Figure 2 is common with communicator shown in Figure 1 on following points: the first communication bandwidth nominal value of a PHY layer protocol processing unit 11 is 20MHz, can comprise or not comprise the MIMO technology; And provide MAC layer 20 and link layer 30.
Yet, because radio communication device shown in Figure 2 is only carried out the MAC based on first processing unit 11, so the MAC layer 20 detail section ground in operation among Fig. 2 are different from communicator shown in Figure 1.If processing unit 11 does not comprise the MIMO technology, communicator then shown in Figure 2 may be corresponding at least one the existing apparatus among IEEE 802.11a, IEEE 802.11b and the IEEE802.1g.
A special case of communicator shown in Figure 2 comprises, for example, and 20-MHz MIMOSTA (AP) and 20-MHz STA (AP).20-MHz MIMO STA (AP) is one can pass through the terminal (or AP) that the 20-MHz channel sends and receives SISO and send and receive MIMO by 20-MHz.20-MHz STA (AP) is an energy sent and received SISO by 20-MHz a terminal (or AP).
An example that comprises the network 100 of radio communication device illustrated in figures 1 and 2 is shown in Fig. 3.Base station 101 in the network 100 is the AP corresponding to 40-/20-MHz MIMO AP.Terminal 102-106 foundation is connected with base station 101.Here, terminal 102 is a 40-/20-MHz MIMO STA_1, and terminal 103 is a 40-/20-MHz MIMOSTA_2, and terminal 104 is a 40-/20-MHz STA, terminal 105 is 20-MHzMIMO STA, and terminal 106 is 20-MHz MIMO STA_1.Another terminal 107 is 20-MHz MIMO STA_2, and supposes that it belongs to network 100 network in addition, for example, uses the network of 20M_ch_b.
The 40MHz channel 40M_ch that network shown in Figure 3 will use the 20MHz channel 20M_ch_a of X MHz-(X+20) MHz frequency band and use X MHz-(X+40) MHz frequency band is as communication channel, as what schematically show in Fig. 4.Therefore, the two uses the frequency band of X MHz-(X+20) MHz redundantly by 20-MHz and 40-MHz channel.The 20MHz channel 20M_ch_b of the frequency band of another use (X+20) MHz-(X+40) MHz is not used by network shown in Figure 3 100, but is used in other network accidentally.
In network 100, use the channel 40M_ch of 40MHz and on frequency with one of overlapping two the 20MHz channel 20M_ch_a of 40M_ch or 20M_ch_b.In other words, suppose that the 40-/20-MHz MIMO STA and the 40-/20-MHz STA that belong to network 100 do not handle 20M_ch_a and 20M_ch_b simultaneously.
In first embodiment, in the network that is shown in Fig. 3 especially, consider each terminal directly mutual communication and the situation by base station (AP) not.Fig. 5 illustrates such network 200.In the network 200 of Fig. 5, formed that 40-/20-MHz STA 1,40-/20-MHz STA2 wherein and 20-MHz STA 1 (terminal 301-303) directly communicate mutually and the network 300 by base station (AP) not, and this situation is corresponding to independent basic service set (IBSS, independent basic service set).Network 200 is corresponding to a basic service set (BSS), and terminal 202 (20-MHz STA 2) and terminal 203 (40-/20-MHzSTA 3) are communicated mutually by base station 201 (40-/20-MHz AP).
As shown in Figure 5, for example, can use in 40-MHz channel and the 20-MHz channel any one in terminal 301, and terminal 303 (20-MHz STA) only can be used under the situation of the 20-MHz channel that coexists as in the network 300, for example, system shown in Figure 6 is considered to a media interviews system.Under the situation of using media interviews system shown in Figure 6, require the control information 60,61 of console for centralized control transmission such as CTS self and QoS CF-poll, and the switching between concentrated area control 20-MHz communication cycle and the 40-MHz communication cycle.Therefore, the network 300 that control station is not set as the IBSS among Fig. 5 in, need an interim console for centralized control (be called as 20-/40-MHz and switch the power owner) and come the switching between centralized control 20-MHz communication cycle and the 40-MHz communication cycle.As described below, from any one terminal of network 300, select 20-/40-MHz to switch the power owner.Below, network 300 shown in Figure 5 will only be called as " IBSS ".
Fig. 7 is the view that is illustrated in the switching of communication cycle among the IBSS.The kind of communication cycle comprises 40-MHz communication cycle that uses the 40MHz channel and the 20-MHz communication cycle that uses the 20MHz channel.It is main bodys of switching these communication cycles that 20-/40-MHz switches power owner 70, and is used for by sending a 20-/40-MHz switching controls frame, with the beginning of each communication cycle or all terminals of end notification composition IBSS.Each STA among the IBSS carries out 20-MHz communication or 40-MHz communication respectively according to the notice of coming adaptive switched power owner 70 in each communication cycle.
In each communication cycle of Fig. 7, for example, utilize MAC system shown in Figure 6.In IEEE 802.11 wireless local area network (WLAN) system, because AP sends the CF-poll at first, so can not freely send the CF-poll as the switching power owner 70 of one of STA of BSS.Therefore, if MAC system shown in Figure 6 is used among the IBSS, then IEEE 802.11 wireless local area network (WLAN) system define the new frame with structure of the structure identical with the CF-poll or a kind of CF-of expansion poll, and define a subtype, be added to the kind of the new frame of CF-poll with expression.This frame is described to the CF-poll '.
Even it is not the AP of BSS that 20-/40-MHz switches the power owner, by use CF-poll, but not the CF-poll, it also can carry out the media interviews system identical with Fig. 6.
Fig. 8 switches the functional-block diagram of power owner when operating as STA as 20-/40-MHz.Fig. 9 is the functional-block diagram when STA operates as the STA except that 20-/40-MHz switches the power owner.
As shown in Figure 8, switch power owner 70 and have the function 80 that is used for determining or obtaining 20-/40-MHz communication cycle (switching cycle), timer function 81 and the function 82 that generates 20-/40-MHz switching controls frame.Function 80 and 81 is the functions corresponding to the network system management unit 25 among Fig. 1.Function 82 is corresponding to the channel occupancy in the access control unit shown in Figure 1 21/opening control unit 24.Timer function 81 receives 20-/40-MHz communication cycle (switching cycle) from function 80, and it is set to a timer numerical value and begins countdown operation.When timer numerical value arrived 0, timer function 81 sent the instruction that generates the switching controls frame to function 82, should move which in 20MHz or the 40MHz communication mode to 20-/40-MHz transmission/receiving element 83 indications simultaneously.In the physical layer 10 of Fig. 1, realize 20-/40-MHz transmission/receiving element 83.
On the contrary, as shown in Figure 9,20-/40-MHz switches STA beyond the power owner and has the function 91 of reception from the communication mode of the switching controls frame that switches the power owner and send and 20-/40-MHz transmission/receiving element 90 of switching the STA of itself.And STA has the function 92 of determining to receive beacon frame, obtains the function 93 that 20-/40-MHz switches power owner address, and the function 94 that generates beacon frame.In the physical layer 10 of Fig. 1, realize 20-/40-MHz transmission/receiving element 90. Function 91 and 92 is corresponding to the channel status administrative unit 23 in the access control unit shown in Figure 1 21.Function 93 is corresponding to network system management unit 25.Function 94 is corresponding to channel occupancy/opening control unit 24.
Below, will illustrate that in each embodiment of the present invention how STA among the IBSS is selected as 20-/40-MHz switches the power owner.First embodiment is such example, and the STA that IBSS wherein has been set becomes 20-/40-MHz and switches the power owner.In other words, the STA that IBSS has been set is the STA that begins direct communication at first.
With reference to the Figure 10 that relates to first embodiment, illustrate in IEEE 802.11 wireless local area network (WLAN) system below, in IBSS, select to switch power owner's process.In these steps, for example, suppose that STA 1 is provided with IBSS.At first, beacon frame 110 of described STA 1 broadcasting.Figure 11 illustrates a kind of form of the beacon frame 110 that is used for first embodiment.At this moment, STA1 sends beacon frame 110 by the channel (20M_ch_a) that uses 20MHz.Provide a 20-/40-MHz to switch code element 111 to beacon frame 110, and the STA 1 of beginning IBSS store the address of itself STA in the code element 111 into as the address that 20-/40-MHz switches the power owner.Each STA of received beacon frame 110 can obtain to switch power owner's address based on code element 111.The STA 1 of beginning IBSS can determine such as the 20-/length of 40-MHz communication cycle and the parameter value of switching cycle, and these parameter values stored among another code element of beacon frame 110 so that send them.After sending beacon frame 110, the switching controls of STA 1 beginning 20-/40-MHz communication.In first embodiment, have only STA 1 to send a 20-/40-MHz communication switching controls frame 114, and switching controls is carried out in the concentrated area.
On the other hand, wish that the STA 2 that enters IBSS detects the beacon frame 110 of STA 1, and pass through to use 20M_ch_a to send a checking frame 112 with the checking radio terminal station to STA 1.By from STA 1 to STA 2 send checking frame 112, set up checking STA 1 and STA 2 between, and STA 2 can enter IBSS thereafter.STA 2 can know to switch whether the power owner exists and described switching power owner's address with reference to the beacon frame from STA 1.
In IBSS, owing to send beacon frame to all STA that constitute IBSS independently and dispersedly, the STA 1 that IBSS is set does not at first send beacon frame at every turn.
In first embodiment, even switching the power owner is that STA 1 and any other STA that IBSS has been set sends described beacon frame, the address of supposing the conduct switching power owner's that IBSS has been set at first STA 1 is stored in the beacon frame (for example, beacon frame 115).When the address of weighing the owner with reference to the switching of the beacon frame that sends from other STA generated beacon frame, other STA that sends beacon frame can be to switch the power owner with the address descriptor of same STA.
Provide parameters according to following described explanation,, be used for by switching 20-MHz communication that the power owner carries out and switching cycle and the switching frequency between the 40-MHz communication such as the length and the time started thereof of each communication cycle.
For example, each communication cycle that communication is communicated by letter with 40-MHz such as 20-MHz and the parameter value of switching cycle are set to fixed value in advance.At the IBSS duration of existence, IBSS always is to use these values.These parameter values can determine when starting IBSS by switching the power owner, and can be used as these parameter values by being the value that the BSS of upper strata (parents) relation determines with IBSS.
In another example, switching the power owner can dynamically change such as the length of each communication cycle and the parameter value of switching cycle.For example, switch the power owner and can change parameter value, so that carry out 20-MHz communication or the 40-MHz communication and the traffic thereof according to the number of terminal.
Preferably, switching power owner STA in addition in IBSS can be by sending claim frame, to switching length and the switching cycle that the power owner requires to change each communication cycle.Figure 12 illustrates the functional-block diagram in the situation of just having described in the above.Terminal 120 has and generates one to switching the function 127 that the power owner requires to prolong the claim frame of 40-MHz communication cycle, be stored in the transmission data volume that sends in the data buffer zone 126 when surpassing defined threshold with box lunch, use the 40-MHz channel to carry out high-speed communication.Function 122-125 is identical with corresponding function among Fig. 9.In the physical layer 10 of Fig. 1, realize sending data buffer zone 126.Function 127 is corresponding to channel occupancy/opening control unit 24 of Fig. 1.
When receiving the claim frame of the length that require to change each communication cycle or switching cycle, switching the power owner can be according to the content of request change, change the length or the switching cycle of each communication cycle, can also be according to the content of request, continue to use each original value by refusing this request, and do not change the parameters value.
Secondly,, switch the power owner, send a 20-/40-MHz switching controls frame in fact according to request from the STA among the IBSS with regard to the switching between 20MHz and the 40MHz.That is, only when the 40-MHz communication request frame that receives from a STA, switch the conversion that the power owner begins to send the CTS itself among Fig. 6 and carries out the 40-MHz communication cycle.This is a system, and therein, one is only carried out 20-MHz communication usually and because of there being a large amount of transmission data to wish the STA of high speed 40-MHz communication, sends a claim frame that requires 40-MHz communication to switching the power owner in IBSS.
In contrast, the common communication among the IBSS is performed as 40-MHz communication, and only according to the request from STA, the 40-MHz transition of communications is communicated by letter to 20-MHz.
In first embodiment, during forming IBSS, switching the power owner is the STA that has started IBSS.Cause owing to the motion of the power shortage of battery or STA under certain situation of interruption of radio wave, will make and switch the power owner and from IBSS, withdraw from.Therefore,, then select a 20-/40-MHz and switch the power owner, and be kept for the concentrated switching controls of 20-/40-MHz communication as the successor if from IBSS, withdraw from as the original STA that switches the power owner.
For example, when switching power owner withdraws from from IBSS, the selected switching power owner of one of each STA that forms IBSS as the successor.Factor such as the transmission data volume that physical capability or each STA stored that each STA had becomes the reference conditions of selecting to switch the power owner.Switch the power owner by 20-/40-MHz switching controls power transferring data of storage therein transmit frame, and will be chosen to be and switch this fact of power owner and notify chosen STA.Chosen STA receives transfer of power frame, and, if possible, reply a switching controls power to switching power owner and accept frame.Switch the power owner and can new 20-/40-MHz be switched all STA among the address notification IBSS that weighs the owner by broadcasting after the STA that is selected as the successor receives that power is accepted frame.Thus, when each STA sent beacon frame, the address that the owner is weighed in the switching of preparing to describe in beacon frame can be updated to up-to-date information.
When switching power owner withdrawed from from IBSS, following example can be considered as selected 20-/40-MHz to switch power owner's successor's method.At first, before withdrawing from, switch the power owner and broadcast the claim frame by turns that 20-/40-MHz switches the power owner from IBSS.In handover request frame, the terms and conditions that switches the required STA ability of power owner such as becoming is described.Satisfy these conditions if received the STA of described handover request frame, then described STA replys a 20-/40-MHz switching power owner's candidate frame or broadcasts it to switching the power owner.In the candidate frame, the STA ability of the STA of itself has been described.
Switch the power owner and receive 20-/40-MHz switching power owner candidate frame, and select a STA as the successor from each STA.In this system of selection, switch the power owner and can use the STA ability of in the candidate frame, describing, and can use other method.Switch the power owner after selected STA, send transfer of power frame to corresponding STA as the successor.In fact successor STA just begins the switching controls between 20-MHz communication and the 40-MHz communication after receiving transfer of power frame.
After finishing above-mentioned steps, switching power owner or successor STA can be by broadcasting, with all STA among new switching power owner's the described IBSS of address notification.
In said method,, then switch the power owner and select its successor STA if a plurality of STA becomes the candidate that switches the power owner.Except this method, can consider such system, therein, each candidate STA is at war with mutually, and finally obtains 20-/40-MHz switching controls power as final victor's STA.
For example, after claim frame is rotated in switching power owner broadcasting, provide the race cycle of an appointment.The length of competing cycle for example, can be described in rotating claim frame.In competing cycle, become each a STA broadcasting 20-/40-MHz switching power owner candidate frame of STA in IBSS that 20-/40-MHz switches power owner's candidate.At this moment, each STA response becomes the transmission number of times that switches the necessary scale of weighing the owner and determine the candidate frame in advance, and attempts sending in competing cycle described transmission number of times.
It is passable to become the necessity of switching the power owner, for example, responds the transmission data volume that each STA has and determines.Have the STA that becomes the higher necessity of switching the power owner big transmission number of times is set, then continuing to send the candidate frame increases up to the possibility that competing cycle finishes.Continue to send the STA acquisition switching controls power that the candidate frame finishes up to competing cycle, and become the next power owner of switching.
Perhaps, preferably carry out automatic operation, so that by checking the STA ability in the candidate frame mutually, if there is a STA who has than the higher ability of STA of itself, then the STA of itself does not send the candidate frame.In this case, continue to send the candidate frame and also will obtain switching controls power, and become next 20-/40-MHz switching power owner up to the STA of competing cycle end.
When switching power owner withdraws from from IBSS, will consider such a case, wherein switch the power owner and do not select a switching to weigh the successor of owner, and do not do anything and just withdraw from as it.In this case, detect the STA that in IBSS, switches power owner disappearance and may become a new 20-/40-MHz switching power owner.
Switch power owner disappearance if a plurality of STA detect, for example, between each STA, carry out above-mentioned competition, and can become new switching power owner as final victor's STA.Yet, do anything and just do not withdraw from if switch the power owner from IBSS, because competing cycle is not set up as yet, detects at first and switch the STA that the power owner lacks and in IBSS, broadcast the competing cycle start frame.Thus, just can begin each step same as described above.In this case, detect the STA that switches power owner disappearance at first and determine the length of competing cycle, and in the competing cycle start frame, describe described length.
Consider a kind of method of switching power owner disappearance that is used to detect now, therein, in the cycle of an appointment, do not carry out the switching between 20-MHz communication and the 40-MHz communication fully.If in the cycle of a prior appointment, each STA does not receive 20-/40-MHz communication switching controls frame from switching the power owner, then each STA determines that switching power owner withdraws from from IBSS, and determines a new switching power owner according to said method.
Switch the another kind of method of weighing owner's disappearance as detection, consider such a case, therein, switching power owner does not reply switching power owner should be to its particular event that responds.For example, receive the claim frame of communicating by letter for 40-MHz if switch the power owner from a STA, then consider the situation of communication steps, therein, switching power owner sends from 20-MHz communication and switches to 40-MHz control of communication information.STA is provided with a timer in 40-MHz communication request frame, so that send the described request frame, then, do not send in the time that timer sets from 20-MHz communication and switch to 40-MHz control of communication information if switch the power owner, then STA determines to switch the power owner and withdraws from from IBSS.Perhaps, if after transmission several times claim frame, switch the power owner and the claim frame of 40-MHz communication is not responded, then STA determines that switching power owner withdraws from from IBSS.
After this, determine that according to said method a new 20-/40-MHz switches the power owner.
According to aforesaid first embodiment,, can carry out MAC for coexisting as a plurality of channels that have different bandwidth in the same frequency band at the IBSS that is used for not undertaken the radio terminal station of direct communication by console for centralized control.
(second embodiment)
First embodiment illustrates the STA that IBSS is set becomes the situation that 20-/40-MHz switches the power owner, and second embodiment illustrates the situation that the STA that successfully sends beacon frame becomes switching power owner.
Between all STA that form IBSS, independently and dispersedly send the beacon frame among the IBSS.The STA that IBSS initially has been set determines the beacon period among the IBSS, and describes the value of described beacon period in beacon frame and probe response frame.The STA that enters IBSS is with reference to the beacon period that is provided with in beacon frame and response frame.
In IBSS, at each target beacon transmitting time (TBTT, target beacontransmission time), timing synchronization function (TSF, timing synchronizationfunction) timer is reset to 0, and each STA attempts sending beacon frame according to the following step in timing place that resets.
With reference to the Figure 13 that relates to second embodiment, illustrate in a second embodiment below, be used to select to switch power owner's step.
At first, each STA is at TBTT interruption each frame except that beacon frame.Each STA generates beacon frame and sends with trial, and the STA address that they are own is stored in the beacon frame as switching the power owner.Parameter such as length, switching cycle and the switching times of each communication cycle also can be written into beacon frame respectively.Thereafter, each STA begins the countdown of fallback counter, and when counter arrives 0, sends beacon frame by using the 20-MHz channel.If arrived before 0 at counter, each STA receives the beacon frame that sends from other STA, and then each STA cancellation sends the beacon frame of itself.
In the step of second embodiment, because weighing the owner with the STA address of itself as switching, each STA stores in the beacon frame, so obtained the beacon frame that the STA of beacon transmission route will be sent in the STA address of wherein storing itself.Therefore, during beacon sent later beacon interval, as the victor's of rollback STA, that is, the STA that successfully obtains transmission route became and switches the power owner.During beacon sends later beacon interval, become the STA that switches the power owner and can this STA be become itself other each STA that switches among this true notice IBSS of power owner by the STA address of itself is stored in the beacon frame as switching the power owner.
In a second embodiment, can become switching power owner at the different STA of each beacon interval.In the example of Figure 13, during sending the later beacon interval of beacon frame, the STA 1 that has become the victor of rollback and sent a beacon frame becomes and switches the power owner, and sends a 20-/40-MHz switching controls frame 131.During next beacon interval, STA 2 is victor and beacon frames 132 of its transmission of rollback.And STA 2 becomes and switches the power owner, and sends 20-/40-MHz switching controls frame 133,134 etc.
Under the situation of IBSS, send a beacon frame owing to become the victor's of rollback STA to TBTT, so just exist plural STA to send the possibility of beacon simultaneously.In this case, any one STA can become by competition and switch the power owner, and perhaps in the middle of the STA of each competition, two or more STA can become and switch the power owner.
If the parameter such as length, switching cycle and the switching frequency of each communication cycle of 20-/40-MHz communication is defined as fixed value in advance, then at the IBSS duration of existence, even switch power owner's difference or beacon interval difference, each fixed value of being stipulated is in advance continued to use usually consistently.In other words, each STA writes beacon frame with identical parameter value, switches the power owner even any STA becomes by rollback, and the length of each communication cycle is identical with switching cycle.
Switch the power owner and can determine the length and the switching cycle of each communication cycle, and be that the BSS on the upper strata of IBSS can determine them in advance in the time started of IBSS.
With reference to beacon frame, all STA can know the set point of length and switching cycle, even and any STA become and switch the power owner, also can on the basis of set point, carry out the switching controls of 20-/40-MHz communication.
Each switches length and switching cycle that the power owner can change each communication cycle up hill and dale.For example, can change length and switching cycle according to carrying out the terminal number and the traffic that 20-MHz communication communicates by letter with 40-MHz.In this case, become the victor of rollback and become length and the switching cycle that the STA that switches the power owner determines each communication cycle, and in sending the later beacon interval of beacon frame, the switching of control 20-/40-MHz communication.
Under the situation of second embodiment switch the power owner owing to may become at the different STA of each beacon interval, so at the length of each each communication cycle of beacon interval and switching cycle with different.
The STA of composition IBSS except switching the power owner can send for the length of each communication cycle and the change request of switching cycle to switching the power owner.When switching the power owner when receiving change request for the length of each communication cycle and switching cycle, switching the power owner can perhaps continue to use identical numerical value and do not change them according to the content changing length or the switching cycle of this request.
In a second embodiment, only therein itself STA as the beacon interval of switching the power owner during, switch length and switching cycle that the power owner could change each communication cycle.
The second above-mentioned embodiment also can carry out MAC for a plurality of channels with different bandwidth that coexist as among the IBSS in the same frequency band, and therein, each radio terminal station carries out direct communication mutually and do not pass through console for centralized control.
(the 3rd embodiment)
First embodiment illustrates the STA that IBSS is set becomes the situation that 20-/40-MHz switches the power owner, and second embodiment illustrates the situation that the STA that successfully sends a beacon frame becomes switching power owner.The third embodiment of the present invention is such a case, therein, wishes that the STA that carries out the data transmission by the 40-MHz channel becomes 20-/40-MHz switching power owner.
In IBSS, carry out 20-MHz communication usually, the switching between 20-MHz communication and the 40-MHz communication is unnecessary.Therefore, in the 3rd embodiment, do not specify and switch the power owner.In such IBSS, if the transmission data volume that some STA have is very big, and described STA wishes to communicate by letter by 40-MHz and carries out high-speed communication, and then this STA itself becomes 20-/40-MHz and switches the power owner, will communicate by letter with switching to 40-MHz from 20-MHz communication and communicate by letter in IBSS.
At first, each STA checks the transmission buffer in their STA, and if be stored in transmission data volume in the buffer greater than the threshold value of regulation, then each STA will switch to IBSS broadcasting 20-/40-MHz respectively and weigh owner's candidate frame.
If the STA that has broadcasted the candidate frame subsequently with cycle of appointment in, do not receive any candidate frame from other STA, then the STA of itself becomes and switches the power owner, and begins to send control information, so that channel is switched to 40-MHz communication from 20-MHz communication.
If a plurality of STA become the candidate that switches the power owner, for example, each STA is as being at war with described in first embodiment, and the STA that has become last victor may be a new switching power owner.
In this case, become the STA that switches power owner candidate at first and broadcast a competing cycle start frame to IBSS.Consequently, the STA that has become new switching power owner can begin to be similar to the competition step described in first embodiment.In this case, become the length that the STA that switches power owner candidate determines competing cycle at first, and it is write the competing cycle start frame.
The 3rd above-mentioned embodiment also can carry out MAC for a plurality of channels with different bandwidth that coexist as in the same frequency band in IBSS, therein, each radio terminal station carries out direct communication mutually and do not pass through console for centralized control.
To one skilled in the art, they will easily obtain the benefit of adding and make additional modification.Therefore, from broad aspect, the present invention is not limited to here institute specific details and representational each embodiment of showing and describing.Therefore, under the prerequisite of not leaving by the spirit of the general inventive concept of appending claims and equivalent defined thereof and scope, can make various modifications.
The cross reference of related application
The application is based on the previous Japanese patent application of submitting on June 24th, 2004 004-187032 number and advocate its priority, and the full content of above-mentioned application is here incorporated into by reference.
Claims (17)
1, a kind of wireless communication system with a plurality of radio terminal stations, described radio terminal station carry out direct communication and do not pass through the wireless base station, and this system comprises:
Wireless Telecom Equipment, it is configured to use first channel with first frequency band to carry out first radio communication, perhaps uses to have bandwidth and carry out second radio communication greater than the second channel of second frequency band of the bandwidth of first frequency band;
Generation equipment, it is configured to generate a switching controls frame, so that control is carried out the communication cycle of first radio communication and carried out switching between the communication cycle of second radio communication; And
Communication control unit, it is configured to control described Wireless Telecom Equipment, so that send the switching controls frame that generates by generation equipment,
Wherein, be selected as the described radio terminal station of Provisional Center control station, be used to control the switching between first radio communication and second radio communication with switching controls power.
2, wireless communication system according to claim 1, wherein, the radio terminal station that begins direct communication at first is selected as the Provisional Center control station.
3, wireless communication system according to claim 1, wherein, the radio terminal station that has successfully sent a beacon frame after the rollback of the access control of relevant wireless communication media is selected as the Provisional Center control station.
4, wireless communication system according to claim 3 wherein, changes described Provisional Center control station in each beacon interval.
5, wireless communication system according to claim 1, wherein, described Provisional Center control station is specified any one radio terminal station, and switching controls power is transferred to the radio terminal station of appointment.
6, wireless communication system according to claim 5 wherein, is specified described radio terminal station according to the physical capability of radio terminal station.
7, wireless communication system according to claim 1, wherein, the radio terminal station of having asked to begin second radio communication is selected as the Provisional Center control station.
8, wireless communication system according to claim 1, wherein, the radio terminal station of abandoning that has detected switching controls power is selected as the Provisional Center control station.
9, wireless communication system according to claim 1, wherein, the radio terminal station that has detected the disappearance of Provisional Center control station is selected as the Provisional Center control station.
10, wireless communication system according to claim 9, wherein, detect the disappearance of Provisional Center control station by the following fact, promptly, in a beacon interval, the switching between the communication cycle that does not occur fully carrying out the communication cycle of first radio communication and carrying out second radio communication.
11, wireless communication system according to claim 9, wherein, according to the disappearance that detects the Provisional Center control station from the stand-by period corresponding to the response frame of the claim frame that is sent to described Provisional Center control station of Provisional Center control station.
12, wireless communication system according to claim 5 wherein, is selected the Provisional Center control station by the competition from each radio terminal station.
13, wireless communication system according to claim 1, wherein, the communication cycle of the communication cycle of first radio communication and second radio communication is fixing on length, and, periodically switch each communication cycle.
14, wireless communication system according to claim 1, wherein, the Provisional Center control station change in the length of communication cycle of the communication cycle of first radio communication and second radio communication or the switching cycle at least any one.
15, wireless communication system according to claim 14, wherein, Provisional Center control station response is from the change claim frame of the radio terminal station except that the Provisional Center control station, change in the length of communication cycle of the communication cycle of first radio communication and second radio communication or the switching cycle at least any one.
16, wireless communication system according to claim 1, wherein, only receive change during claim frame from the radio terminal station except that the Provisional Center control station when the Provisional Center control station, the Provisional Center control station carries out the switching controls between the communication cycle of the communication cycle of first radio communication and second radio communication.
17, radio communication device that is used for wireless communication system, this wireless communication system have a plurality ofly can carry out direct communication and not by the radio communication device of wireless base station, described radio communication device comprises:
Wireless Telecom Equipment, it is configured to use first channel with first frequency band to carry out first radio communication, perhaps uses to have bandwidth and carry out second radio communication greater than the second channel of second frequency band of the bandwidth of first frequency band;
Generation equipment, it is configured to generate a switching controls frame, carries out the communication cycle of first radio communication and carries out switching between the communication cycle of second radio communication with control; And
Communication control unit, it is configured to control described Wireless Telecom Equipment, so that send the switching controls frame that generates by generation equipment,
Wherein, be chosen to be the described radio terminal station of Provisional Center control station, control the switching between first radio communication and second radio communication with switching controls power.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2004187032A JP4113160B2 (en) | 2004-06-24 | 2004-06-24 | Wireless communication system and wireless communication method |
| JP2004-187032 | 2004-06-24 | ||
| JP2004187032 | 2004-06-24 |
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| CN1713775A true CN1713775A (en) | 2005-12-28 |
| CN100423607C CN100423607C (en) | 2008-10-01 |
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| CNB2005100809337A Active CN100423607C (en) | 2004-06-24 | 2005-06-24 | Wireless communication system and device |
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| US (1) | US7430195B2 (en) |
| EP (1) | EP1610509A1 (en) |
| JP (1) | JP4113160B2 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102123504A (en) * | 2010-01-11 | 2011-07-13 | 宏达国际电子股份有限公司 | Carrier indication method for wireless communication system and relative communication device |
| CN102204321A (en) * | 2008-09-04 | 2011-09-28 | 夏普株式会社 | Wireless communication apparatus and wireless communication system |
| CN102238640A (en) * | 2010-04-26 | 2011-11-09 | 英特尔公司 | Method, apparatus and system for switching traffic streams among multiple bands |
| CN102422695A (en) * | 2009-05-25 | 2012-04-18 | 夏普株式会社 | Wireless communication system, wireless communication method, terminal apparatus, and communication apparatus |
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Families Citing this family (27)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4113160B2 (en) | 2004-06-24 | 2008-07-09 | 株式会社東芝 | Wireless communication system and wireless communication method |
| US7987499B2 (en) * | 2004-08-18 | 2011-07-26 | Broadcom Corporation | Method and system for exchanging setup configuration protocol information in beacon frames in a WLAN |
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| US8451808B2 (en) * | 2006-02-18 | 2013-05-28 | Intel Corporation | Techniques for 40 megahertz (MHz) channel switching |
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| DK2207314T3 (en) * | 2006-04-25 | 2011-10-31 | Interdigital Tech Corp | High throughput channel operation in a local wireless mesh network |
| KR101330633B1 (en) * | 2006-06-08 | 2013-11-18 | 삼성전자주식회사 | Method and apparatus for wireless communication |
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| US9565690B2 (en) | 2011-11-30 | 2017-02-07 | Nokia Technologies Oy | Medium access control method enhancement |
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| US9844065B2 (en) * | 2015-06-30 | 2017-12-12 | Qualcomm Incorporated | Optimizing the reach of a message beacon device |
| KR101822863B1 (en) * | 2016-09-09 | 2018-01-29 | 주식회사 쏠리드 | cellular communication system |
| JP6448831B2 (en) * | 2018-02-16 | 2019-01-09 | キヤノン株式会社 | Communication device, control method, and program |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002001807A2 (en) * | 2000-06-28 | 2002-01-03 | Broadcom Corporation | Multi-mode controller |
| KR100726425B1 (en) | 2001-01-30 | 2007-06-11 | 삼성전자주식회사 | Wireless communication apparatus, wireless communication system employing the same and the control method thereof |
| JP2003087856A (en) | 2001-06-28 | 2003-03-20 | Sony Corp | Wireless base station, wireless terminal, communication method and program |
| DK1405463T3 (en) | 2001-07-02 | 2014-11-24 | Koninkl Philips Nv | Dynamic frequency selection with the recovery of a wireless basic service set network |
| US7248570B2 (en) * | 2001-09-17 | 2007-07-24 | Microsoft Corporation | System and method for coordinating bandwidth usage of a communication channel by wireless network nodes |
| US20040038660A1 (en) * | 2002-08-21 | 2004-02-26 | Ziming He | RF front-end for dual-mode wireless LAN module |
| US9014196B2 (en) * | 2002-09-17 | 2015-04-21 | Broadcom Corporation | System and method for providing a super channel in a multi-band multi-protocol hybrid wired/wireless network |
| US7231220B2 (en) * | 2002-10-01 | 2007-06-12 | Interdigital Technology Corporation | Location based method and system for wireless mobile unit communication |
| JP3516947B2 (en) | 2002-11-07 | 2004-04-05 | シャープ株式会社 | Mobile station |
| US20040218683A1 (en) * | 2003-05-01 | 2004-11-04 | Texas Instruments Incorporated | Multi-mode wireless devices having reduced-mode receivers |
| EP1578095B1 (en) * | 2004-03-17 | 2006-06-28 | Alcatel | Method for controlling the sleep mode on a mobile terminal, corresponding mobile terminal and corresponding radio access node |
| JP4113160B2 (en) | 2004-06-24 | 2008-07-09 | 株式会社東芝 | Wireless communication system and wireless communication method |
-
2004
- 2004-06-24 JP JP2004187032A patent/JP4113160B2/en not_active Expired - Lifetime
-
2005
- 2005-06-23 US US11/159,341 patent/US7430195B2/en active Active
- 2005-06-24 EP EP20050253942 patent/EP1610509A1/en not_active Withdrawn
- 2005-06-24 CN CNB2005100809337A patent/CN100423607C/en active Active
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| US8599813B2 (en) | 2010-04-26 | 2013-12-03 | Intel Corporation | Method, apparatus and system for fast session transfer for multiple frequency band wireless communication |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2006013820A (en) | 2006-01-12 |
| CN100423607C (en) | 2008-10-01 |
| JP4113160B2 (en) | 2008-07-09 |
| US20060013184A1 (en) | 2006-01-19 |
| EP1610509A1 (en) | 2005-12-28 |
| US7430195B2 (en) | 2008-09-30 |
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